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Hello all,

We're evaluating KMS, although I am already leaning towards recommending it.

Have it installed and am currently just using the web interface to test.

I have an Exchange 5.5 server at I have set up the Kerio server to

Here's the problem:

I can send mail from (kerio) to (exchange) and also to

I cannot send mail from (exchange) to (kerio) nor from to (kerio). Gmail doesn't give me a response back, but my exchange server shows the following bounceback message:

The following recipient(s) could not be reached:

'myname<_a.t_>' on 8/20/2008 1:05 PM
The recipient name is not recognized
The MTS-ID of the original message is: c=US;a= ;p=COMPANY;l=SERVER-080820170427Z-21659
MSEXCH:IMS:COMPANY:DOMAIN:SERVER 3550 (000B09AA) 550 5.7.1 Unable to relay for myname<_a.t_>

Here's the odd thing. If I get on the (Exchange) server and open a telnet session to (Kerio) over port 25, I can send the exact message I'm trying to send via the same server, and Kerio doesn't refuse it and I receive the message in KMS web portal.

I checked my firewall to be sure all the ports Kerio is using for the various services are open, but I'm a little bit stumped on this. My searches haven't turned up anything at all.

What I find really odd is that the relaying is refused for the account on the local (kerio) domain and not from the foreign (exchange) account.

Can anyone give this KMS noob some advice?
Pavel Dobry (Kerio)

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It's obvious there is no problem in KMS as you can send the email via telnet session. The problem seems to be on either on Exchange or (which is more likely) in DNS. Make sure that MX record for is correct and that your Exchange server is configured properly for sending emails to this domain (either by forwarding or MX delivery).

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Many thanks for your assistance. You were correct in suspecting DNS - I had an old MX record from when I used for another purpose. A few quick changes to the DNS server and I am up and running.

Thank you.
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